Gas range construction



Filed Sept. 26, 1929 5 `Sheets-Sheet l gli bcep- GA S RANGE CONSTRUCTION Filed Sept. 26, 1929 5 SheetS-Shee 2 @612, 20, QB. L., s, KAUFFMAN LSZSS GA S RANGE CONSTRUCTION Filed Sept. 26. 1929 5 sheets-sheet 5 Patented Oct. y 20, 1931 UNITED STATES PATENT OFFICE LESTER S. KAUFFMAN, 0F RICHMOND HEIGHTS MISSOURI, ASSIGNOR TO AMERICAN STOVE COMPANY, F ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY GAS RANGE C50/INSTRUCTION I Application led September 26, 1929. Serial No. 395,269.

The primary object of the invention is the yprovision of a structure whereby it is possible to conceal both the fuel supply pipe and the mixer face ofthe burner so that a stove of more pleasing appearance isobtained.

Another further object of the invention is the provision of .an air extension sleeve for` stove or range upon which they are used.

. Other 'novel features of construction, ob-

' jects and improved results of the invention will appear from the following description and accompanying drawings.

In the drawings:

Figure 1 is a view in front elevation showing the lay-out of the fuel supply pipes and the burners for the broiler and oven of a gas range, the view further illustrating the application of my improved air extension sleeve to the burners.

Figure 2 is a top plan view of Figure 1.

Figure 3 is an enlarged detail front view of the air extension sleeve.

'Figure 4 is a vertical sectional view illustrating the application of the air extension sleeve to the mixer face of the burner.

Figure 5 is a transverse sectional view of the structure appearing in Figure 4.

Figure 6 is a horizontal sectional view of a modified form of air extension sleeve.

Figure 7 is a vertical sectional view of the structure appearing in Figure 6.

Figure 8 is a vertical sectional view of a still further modification of air extension sleeve structure.

Figure 9 is a horizontal sectional view of lthe structure appearing in Figure 8.

Figure 10 is a vertical sectional view of still another modified form of air extension sleeve structure.

At the present time gas stoves and ran es in which the gas supply pipe is concea ed have come into extenslve use as they are more been externally arranged the pipe pleasing in appearance by noth'aving an unattractive looking gas supply pipe external of the stove or range.

In the past where the gas supply ipe has as been carried to the sides of the range oven and broiler and provided with a gas cock or jet for the delivery of gas into the end of the oven and broiler burners. The ends of the burner which receive the gas are provided with a shutter arrangement to control the admission of primary air to accomplish a proper mixing and as a consequence this in let end of the burners has'been termed the mixing'face of the burner. In those stoves and ranges having an external gas supply conduit the mixing faces of the burners were always visible and they too detracted from the appearance of the range.

The present invention is on an air extension sleeve and cover for the mixing tubes of burners used in the broiler and oven of gas ranges wherein both the mixing faces of the burners -a-re. concealed as is also the gas supply pipe or manifold for the burners.

Fi res 1 and 2 illustrate a suggested layout or a gas cooking range wherein the burners as well as the gas supply pipe are concealed and the mixing tubes of the burners have applied thereto myimproved air extension s-leeve and cover attachment.

In these two figures of the drawings A represents the broiler of the range and B the oven. The broiler burner is designated as 15 and the oven burner as 16. The gas supply for the oven burner is in the form of a pipe or conduit 17 which has one end 18 attached to the cooking top gas supply manifold 19 which is concealed below the top 20 and behind the face plate 21. This pipe 18 extends rearwardly through the cooking top burner chamber and across the back of the range and enters the oven through its rear wall and between its outer end wall 22 and the oven lining wall 23. This pipe can of course run directly to the air extension sleeve C where the rang? is not thermostatically controlled, but in t e drawings a thermostatic control for the range is illustrated and as a consequence the gas supply pipe 17 is in connection with broiler compartments and terminates at one `end in the air extension sleeve E while the opposite end of this pipe 25 is connected to the gas supply pipe 19 concealed within the cooking top burner chamber.

Through experimentation I have found that air extension sleeves of varying constructions can be used with success although the same inventive principle is present in all of the different forms of sleeve attachments. Several forms of the air extension sleeves are illustrated in the drawings from Figure 3 to Figure 10 inclusive and a detailed descri tion of these air extension sleeves and their structural features follows.

At this time it might be well to state that in respect to all of the forms of the invention the sleeves are provided with a'cover plate F which is positioned externally of either the oven or the broiler. This cover is circular in form and provided with a pluralityfof air inlet openings 27. This cover plate is concaved or convex in cross section and positioned so that it bulges slightly outwardly from the external faces of the ran e. As the greater majority of ranges at t e resent time are provided with an enamel inlsh this cover plate is likewise provided on its outer face with an enamel finish so that it will blend with the range finish and not detract from the range appearance. This plate is a vast improvement from the standpoint of ap earance over the mixing face of the range urners which it replaces. 4

Referring now ,to Figures 4 and 5 of the drawings it will be seen that the burner is designated as 15 and its mixing face or bell as 28. This bell at its outer end is rovided with the usual shutter 29 for contro ling the inlet of primary air to the burner.

The oven or broiler lining wall is designated at 23 while the external wall of the broiler or oven is designated at 22. It will be seen that the mixing bell and its shutter terminate in the space 30 between these two walls and that an air extension sleeve G is provided for use with the burner. This air extension sleeve constitutes an open ended tubular member 31 the inner end 32 of which surrounds the mixing face and bell of the burner while its opposite end is provided with a laterally bent or formed circumferential iange 33 which abuts the outer face of the range wall 22 adjacent the circular opening 34 provided therein for the reception of the sleeve. Incidentally the lining wall 23 is likewise provided with acircular opening 35 for the reception of the inner end 32A of the sleeve. i

The gas supply pipe 24 is positioned in the space 30 between t e range wall and the oven lining and carries at its lower end an inwardl extending jet 36 4which passes through the s utter 29 and a suitable opening 37 in the burner bell for the delivery of gas into the mixing tube of the burner 15.

This air extension sleeve is closed at its outer end by the cover plate F heretofore mentioned and in the manufacture of the sleeve this cover is welded to the sleeve iange 33 as at 38. so that the air extension sleeve as an entirety comprises the two parts 31 and the late F.

T is sleeve is supported in place by the gas supply pi e 24 which has an outwardly extendmg stu 39 terminating in a threaded portion 40 backed by a collar 41. The plate F andthe sleeve are clamped against this collar 41 by a suitable draw-up nut 42.

To make the sleeve readily attachable and detachable without the necessity of disturbin the fuel suppl pipe the sleeve31 is provi ed with a notc ed or cut-out portion 43 of a size slightly larger than the diameter of the fuel supply ipe 24. This construc- .tion makes it ossib e to slide the Qeeve into and out of p ace asv desired and when it is positioned to clamp it in place by the drawup nut 42. e

Referring now to Fi res 6 and 7 of the drawings, a sli htly di erent construction is illustrated but ere again we have a fuel supply pipe 24 in the s ace 30 between ythe outer range wall 22 and t e lining wall 23.

In this form of the invention the mixing bell 28 of the burner extends further into the space between the walls than was the case 1n respect to the structure illustrated in Figures 4 and 5 of the drawings, and as a consequence the lower end of the gas supply ipe is provided with an outwardly curve or goose-necked portion 44 so as to carry the gas supply outwardly in front of the burner bell to'permit the inward extension of they su ply jet or nozzle 36through the mixing 'face siutter 29 and the opening 37 of the burner mixing tube.

v n this form of air extension sleeve construction the sleeve 45 has its one end 46 surrounding the mixinfrface and bell end of the burner and is rovided with a notched or cutout portion 4 for the passage of the goose necked end 44 of the fuel supply pipe. The

`opening in the outer wall 22 of the range 1s flared inwardly as at 48 to provide a circum ferential dare which is abutted on its inner lao held in place by the draw-up nut 42 carried on the threaded portion of the stud 39 which is a part of the goose necked gas supply pipe Due to the fact that the burner mixing bell extends further into the space 30 and the curvature of the gas pipe portion 44 the cover 4 plate F in this structure is slightly more concaved or bulged thanis the cover plate in the structure appearing in Figure 4 of the draw'- 1n Us.

Figures 8 and 9 of the drawings illustrate still a further modified construction of air extension sleeve and in this construction the air extension sleeve 50 is a separate member from the cover plate F and the two are preferably made in castings.

The gas supply pipe 24 is positioned in the space 30 between the outer range wall 22 and the lining wall 23 and is provided with a fitting 51 carrying the gas jet or nozzle 36 extending through the shutter 29 through the opening 37 of the mixing bell 28 into the end of the mixing tube for delivery of gas to the burner.

The cover plate is again held in 'place by the draw-up nut 42 mounted on the threaded portion 40 of the stud 39 provided on the ligas supply pipe fitting 50 but in this instance the cover plate is provided with an inset circumferential flange 52 to form an L-shaped seat 53 to receive the edges of the outer wall surrounding the opening which receives the flange 52 of the plate.

- In this construction the air extension sleeve 50 at its top has cast integrally therewith a supplemental stub sleeve 54 through which the fuel supply pipe 24 passes. This stub sleeve 54 is provided with a thickened portion 55 in which is threadedly mounted a setscrew 56 and by tightening this set-screw tight against the fuel supply pipe 24 the collar is rigidly supported in pro r position in respect to the mixer face o the burner tube.

In this construction the air extension sleeve is tapered outwardly while its inner end 57 passes through the opening 58 in the lining wall 23.

Figure 10 illustrates a still further modified form of the invention and is 3a construction wherein the air extension sleeve 59 at its inner end 60 abuts the circumferential shoulders 61 of the mixing bell 28 of the burner tube 15 while its outer end is provided with a circumferential flange 62 which at a plurality of points throughout its circumference is bolted as at 63 to theouter range wall 22.

In this structure the gas pipe^24 is again positioned in the space 30 between the outer range wall 22 and the lining wall 23 and a goose necked fitting 64 carries the gas from the lower end of the supplyv pipe 24 into the mixing bell through the medium of the jetor nozzle 36. Y

The cover late F is clamped against the outer face of) the outer range wall 22 by the draw-up nut 42 mounted on the threaded portion 40 of the stub shaft 39 cast integrally with the goose necked portion 64 of the gas supply pipe conduit.

From the foregoing it will be seen that I have provided numerous constructions of air extension sleeves to take care of the inlet of primary air tothe mixing face of a burner I claim and desire to secure by Letters Patent is:

l. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, an air extension conduit for said burner, said conduit comprising a tubular sleeve having an open end communicating with the burner and carrying at its opposite end a ported cover plate externally of the oven, andv said plate and sleeve supported in position upon said fuel plpe. gas range construction, comprising an oven having concealed therein a burner and a v fuel delivery pipe therefor, said oven provided with an opening opposite the fuel receiving end of the burner, an air extension conduit comprising a tubular sleeve and a ported cover plate, said sleeve provided with a slot for the reception of said fuel delivery pipe, and said sleeve mounted in said oven opening with one end in ,communication with the burner and removably supported upon said fuel supply pipe, for the purpose described. 3. A gas range construction, comprising an oven having a lining therein, a burner in the oven having a mixing tube the outer end of which protrudes into the space between the outer oven wall and the wall lining, a fuel delivery pipe positioned in the space between the oven wall and theoven lining for delivering fuel to the burner mixing tube, an air extension conduit for said burner mixing tube, said conduit comprisinga tubular sleeve having one end in communication with the burner mixing tube and its opposite end external of the oven and' provided with a rigidly secured ported cover plate, a slot in said tubular sleeve for the reception of the fuel supply pipe, and said sleeve and plate .removably supported upon the fuel supply pipe, for the purpose described. t

Aio

4. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, said burner having a mixing tube, said oven wall rovided with an opening opposite the en of said burner mixing tube, and an air extension sleeve mounted in said oven wall opening,said extension sleeve having communicatien at one end with the burner mixing tube and its opposite end in communication with the atmosphere external of the oven wall.

A 5. A gas ran e construction, comprising an oven and a lining therefor, a burner and a fuel delivery pipe therefor concealed in the oven, the fuel delivery pipe positioned in the space between the oven lining and the oven wall, said oven wall and oven lining provided with aligned openings, said urner provided with a mixing tube having an end extending through the oven lining opening into the space between the lining and tlny oven wall, and a rimary air inlet extension conduit for said lliurner mixin tube removably supported in said aligne openings.

6. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, said burner provided with a. lmixing tube and the oven wall with an opening opposite the end of said mixing tube, the edges of the oven wall surrounding said opening being lared inwardly, and a primary air inlet extension conduit for said burner mixing tubeV havin a flared end abuttingv and supported by t e flared edge of the oven wall opening, for the purpose described. n

7. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pi therefor, said burnerprovided with a mixing tube and the oven wall with an opening the edges of which are flared inwardly, a primary air inlet extension conduit for said burner mixin tube having van opening for the passage o the fuel supply pipe and a flared edge abutting and supported upon the flared edge of the oven opening, and a ported cover plate for the oven wall opening removably supported upon the fuel supplyrpipe, for the purpose described.

8. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, said burner provided With amixing tube and the oven wall with an opening opposite the end of said mixing tube, a primary air inlet extension conduit for said burner mixing tube having its outer end in communication with said oven wall opening, said air extension conduit provided with a sleeve for the reception of the fuel supply pipe, a set-screw carried by said conduit sleeve and adapted to be tightened against the fuel supply pipe for supporting the conduit in position, and a ported cover plate positone in said oven wall opening and removably supported in place therein upon the fuel supp y pipe.

9. A gas range construction, comprising an oven having concealedtherein a burner and a fuel delivery pi e therefor, said burner provided with a mixing tube and the oven wall with an opening opposite the end of said mixing tube, a primary air. inlet extension conduit for said burner mixing tube, the outer end of said conduit provided with a peripheral flange by which the conduit is'secured to the edges' of the oven wall surrounding said oven Wall opening, and a ported cover plate for said oven wall opening removably supported upon the fuel supply pipe.

10. A gas range construction, com rising an oven having concealed therein a urner and afuel delivery ipe therefor, said burner provided with a mixing tube and the oven wall with an opening opposite the end of saidmixing tube, a primary air inlet extension conduitforsaid burner mixing tube, said conduit comprising a tubular sleeve the outer end of which is provided with a circumferential flange adapted to abut the edges of the oven wall surrounding the opening therein, a ported plate rigidly secured to the outer end of the conduit, a slotted opening for the reception of the fuel supply pipe, the fuel 'supply pipe provided with an outwardly extending threaded stud adapted to pass through the cover plate, and a draw-up nut carried by said fuel pipe stud, whereby the conduit is removably supported in/ the oven wall o ening, for the purpose described.

11. D gas range construction comprising an oven having therein av burner and a fuel delivery pipe therefor, an air extension conduit for said burner, said conduit comprising a tubular sleeve having an o en end communicating with the burner an carrying at its opposite end a ported cover late externally ofthe oven, said fuel suppl) pipe provided with an extension, and sai plate and sleeve supported upon said fuel pipe extension.

12. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, said oven provided with an opening opposite the fuel receiving end of the burner, an air extension conduit comprising a tubular sleeve and a ported cover plate, said sleeve provided with a passageway for the reception of said fuel of which protrudes into the space between the outer oven wall and the Wall linin a fuel delivery pipe positioned in the space etween 130 the oven wall and the oven lining for delivering fuel to the burner mixing tube, an air extension conduit for said burner mixing tube having one end in communication with the burner mixing tube and its opposite end external of the oven and carrying a ported cover plate, a passageway in said conduit for the reception of the fuel supply pipe, and.

/ tending through the oven lining opening'into the space between the lining and the oven wall, and a primary air inlet extension conduit for said burner mixing tube positioned in said oven wall and lining openings.'

15. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, said burner provided with a mixing tube and an oven wall with an opening opposite the end of said mixing tube, a primary air inlet extension conduit for said burner mixing tube having a flared end abutting and supported by the oven wall, and a ported cover plate for the open ,outer end of said primary air inlet extension,

for the purpose described.

16. A gas range construction, comprising an oven 'having concealed therein a burner and a fuel delivery pipe therefor, said burner provided with a mixing tube and an oven wall with an opening the edges of which are ared inwardly, a primary air inlet extension conduit for said burner mixing tube having an opening for the passage of the fuel supply pipe and a {iared edge abutting and supported upon the flared e ge of the oven openlng, and a ported cover plate for the oven wall opening, for the purpose described.

17. A gas range construction, comprising an ovenv and a lining therefor, a burner and a fuel delivery pipe therefor concealed in the oven, the fuel delivery pipe positioned in the space between the oven lining and the oven wall, said burner provided with a mixing tube having a bell shaped end, said bell shaped portion of said mixing tube being positioned in the .space between the oven wall and the oven lining, an opening in the oven wall opposite the end of said mixing tube, a primary air inlet extension conduit having neck provided with an extension, and a ported cover plate for the end of said primary air inlet conduit supported upon said gas delivery pipe goose-neck extension, for the purpose described.

18. A gas range construction, comprising an oven having concealed therein a burner and a fuel delivery pipe therefor, said burner provided with a mixing tube and the oven wall with an opening adjacent the end of said mixing tube, a primary air inlet extension conduit for said burner mixing tube having its outer end in communication with said oven wall opening, said air extension conduit provided with a sleeve for the reception of the fuel supply pipe, a clamp carried by said conduit sleeve and adapted to tighten upon the fuel supply pipe for supporting the conduit in position, and a ported coverplate positioned in said oven wall opening, for the purpose described.

19. A gas range construction, comprising signature. if n LESTER S. KAUFFMAN.

hereunto afIix my one end in communication with the oven wall opening and its other end in communication with the end of the burner mixing tube, said fuel delivery pipe provided with a goose-neok passing through said primary air inlet extension conduit y and exten ing outwardly through the oven wall opening, said goose- 

